Quote:
Originally Posted by LuckyFordGuy
I have been using Rotella T 15-40 for 10 years in my flat head 50 ford V8
Now they changed the label to Rotella T-4 15-40 and it says comparable to the previous Rotella T 15-40. My question is does it still have enough Zink in it?
Any response is appreciated. I don't want to ruin my cam. What is the next best oil for my flat head?
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I bet at some point in its life, your '50 Ford ran many miles on non-detergent oil (so no zinc) and the cam survived just fine! I'd guess also that once it became an oil burner, it was fed re-refined oil, the cheapest available!
And still the cam survived. So your cam will survive just fine on any modern oil, which still has some zinc in it.